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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [net/] [usb/] [mcs7830.c] - Blame information for rev 62

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/*
 * MosChips MCS7830 based USB 2.0 Ethernet Devices
 *
 * based on usbnet.c, asix.c and the vendor provided mcs7830 driver
 *
 * Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>
 * Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
 * Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>
 * Copyright (c) 2002-2003 TiVo Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
 
#include <linux/crc32.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/init.h>
#include <linux/mii.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/usb.h>
 
#include "usbnet.h"
 
/* requests */
#define MCS7830_RD_BMREQ        (USB_DIR_IN  | USB_TYPE_VENDOR | \
                                 USB_RECIP_DEVICE)
#define MCS7830_WR_BMREQ        (USB_DIR_OUT | USB_TYPE_VENDOR | \
                                 USB_RECIP_DEVICE)
#define MCS7830_RD_BREQ         0x0E
#define MCS7830_WR_BREQ         0x0D
 
#define MCS7830_CTRL_TIMEOUT    1000
#define MCS7830_MAX_MCAST       64
 
#define MCS7830_VENDOR_ID       0x9710
#define MCS7830_PRODUCT_ID      0x7830
 
#define MCS7830_MII_ADVERTISE   (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \
                                 ADVERTISE_100HALF | ADVERTISE_10FULL | \
                                 ADVERTISE_10HALF | ADVERTISE_CSMA)
 
/* HIF_REG_XX coressponding index value */
enum {
        HIF_REG_MULTICAST_HASH                  = 0x00,
        HIF_REG_PACKET_GAP1                     = 0x08,
        HIF_REG_PACKET_GAP2                     = 0x09,
        HIF_REG_PHY_DATA                        = 0x0a,
        HIF_REG_PHY_CMD1                        = 0x0c,
           HIF_REG_PHY_CMD1_READ                = 0x40,
           HIF_REG_PHY_CMD1_WRITE               = 0x20,
           HIF_REG_PHY_CMD1_PHYADDR             = 0x01,
        HIF_REG_PHY_CMD2                        = 0x0d,
           HIF_REG_PHY_CMD2_PEND_FLAG_BIT       = 0x80,
           HIF_REG_PHY_CMD2_READY_FLAG_BIT      = 0x40,
        HIF_REG_CONFIG                          = 0x0e,
           HIF_REG_CONFIG_CFG                   = 0x80,
           HIF_REG_CONFIG_SPEED100              = 0x40,
           HIF_REG_CONFIG_FULLDUPLEX_ENABLE     = 0x20,
           HIF_REG_CONFIG_RXENABLE              = 0x10,
           HIF_REG_CONFIG_TXENABLE              = 0x08,
           HIF_REG_CONFIG_SLEEPMODE             = 0x04,
           HIF_REG_CONFIG_ALLMULTICAST          = 0x02,
           HIF_REG_CONFIG_PROMISCIOUS           = 0x01,
        HIF_REG_ETHERNET_ADDR                   = 0x0f,
        HIF_REG_22                              = 0x15,
        HIF_REG_PAUSE_THRESHOLD                 = 0x16,
           HIF_REG_PAUSE_THRESHOLD_DEFAULT      = 0,
};
 
struct mcs7830_data {
        u8 multi_filter[8];
        u8 config;
};
 
static const char driver_name[] = "MOSCHIP usb-ethernet driver";
 
static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data)
{
        struct usb_device *xdev = dev->udev;
        int ret;
 
        ret = usb_control_msg(xdev, usb_rcvctrlpipe(xdev, 0), MCS7830_RD_BREQ,
                              MCS7830_RD_BMREQ, 0x0000, index, data,
                              size, MCS7830_CTRL_TIMEOUT);
        return ret;
}
 
static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, void *data)
{
        struct usb_device *xdev = dev->udev;
        int ret;
 
        ret = usb_control_msg(xdev, usb_sndctrlpipe(xdev, 0), MCS7830_WR_BREQ,
                              MCS7830_WR_BMREQ, 0x0000, index, data,
                              size, MCS7830_CTRL_TIMEOUT);
        return ret;
}
 
static void mcs7830_async_cmd_callback(struct urb *urb)
{
        struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
 
        if (urb->status < 0)
                printk(KERN_DEBUG "%s() failed with %d\n",
                       __FUNCTION__, urb->status);
 
        kfree(req);
        usb_free_urb(urb);
}
 
static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data)
{
        struct usb_ctrlrequest *req;
        int ret;
        struct urb *urb;
 
        urb = usb_alloc_urb(0, GFP_ATOMIC);
        if (!urb) {
                dev_dbg(&dev->udev->dev,
                        "Error allocating URB in write_cmd_async!\n");
                return;
        }
 
        req = kmalloc(sizeof *req, GFP_ATOMIC);
        if (!req) {
                dev_err(&dev->udev->dev,
                        "Failed to allocate memory for control request\n");
                goto out;
        }
        req->bRequestType = MCS7830_WR_BMREQ;
        req->bRequest = MCS7830_WR_BREQ;
        req->wValue = 0;
        req->wIndex = cpu_to_le16(index);
        req->wLength = cpu_to_le16(size);
 
        usb_fill_control_urb(urb, dev->udev,
                             usb_sndctrlpipe(dev->udev, 0),
                             (void *)req, data, size,
                             mcs7830_async_cmd_callback, req);
 
        ret = usb_submit_urb(urb, GFP_ATOMIC);
        if (ret < 0) {
                dev_err(&dev->udev->dev,
                        "Error submitting the control message: ret=%d\n", ret);
                goto out;
        }
        return;
out:
        kfree(req);
        usb_free_urb(urb);
}
 
static int mcs7830_get_address(struct usbnet *dev)
{
        int ret;
        ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,
                                   dev->net->dev_addr);
        if (ret < 0)
                return ret;
        return 0;
}
 
static int mcs7830_read_phy(struct usbnet *dev, u8 index)
{
        int ret;
        int i;
        __le16 val;
 
        u8 cmd[2] = {
                HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR,
                HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index,
        };
 
        mutex_lock(&dev->phy_mutex);
        /* write the MII command */
        ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
        if (ret < 0)
                goto out;
 
        /* wait for the data to become valid, should be within < 1ms */
        for (i = 0; i < 10; i++) {
                ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
                if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
                        break;
                ret = -EIO;
                msleep(1);
        }
        if (ret < 0)
                goto out;
 
        /* read actual register contents */
        ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);
        if (ret < 0)
                goto out;
        ret = le16_to_cpu(val);
        dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",
                index, val, i);
out:
        mutex_unlock(&dev->phy_mutex);
        return ret;
}
 
static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)
{
        int ret;
        int i;
        __le16 le_val;
 
        u8 cmd[2] = {
                HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR,
                HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F),
        };
 
        mutex_lock(&dev->phy_mutex);
 
        /* write the new register contents */
        le_val = cpu_to_le16(val);
        ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);
        if (ret < 0)
                goto out;
 
        /* write the MII command */
        ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
        if (ret < 0)
                goto out;
 
        /* wait for the command to be accepted by the PHY */
        for (i = 0; i < 10; i++) {
                ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);
                if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))
                        break;
                ret = -EIO;
                msleep(1);
        }
        if (ret < 0)
                goto out;
 
        ret = 0;
        dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",
                index, val, i);
out:
        mutex_unlock(&dev->phy_mutex);
        return ret;
}
 
/*
 * This algorithm comes from the original mcs7830 version 1.4 driver,
 * not sure if it is needed.
 */
static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)
{
        int ret;
        /* Enable all media types */
        ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);
 
        /* First reset BMCR */
        if (!ret)
                ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);
        /* Enable Auto Neg */
        if (!ret)
                ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);
        /* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */
        if (!ret)
                ret = mcs7830_write_phy(dev, MII_BMCR,
                                BMCR_ANENABLE | BMCR_ANRESTART  );
        return ret < 0 ? : 0;
}
 
 
/*
 * if we can read register 22, the chip revision is C or higher
 */
static int mcs7830_get_rev(struct usbnet *dev)
{
        u8 dummy[2];
        int ret;
        ret = mcs7830_get_reg(dev, HIF_REG_22, 2, dummy);
        if (ret > 0)
                return 2; /* Rev C or later */
        return 1; /* earlier revision */
}
 
/*
 * On rev. C we need to set the pause threshold
 */
static void mcs7830_rev_C_fixup(struct usbnet *dev)
{
        u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;
        int retry;
 
        for (retry = 0; retry < 2; retry++) {
                if (mcs7830_get_rev(dev) == 2) {
                        dev_info(&dev->udev->dev, "applying rev.C fixup\n");
                        mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,
                                        1, &pause_threshold);
                }
                msleep(1);
        }
}
 
static int mcs7830_init_dev(struct usbnet *dev)
{
        int ret;
        int retry;
 
        /* Read MAC address from EEPROM */
        ret = -EINVAL;
        for (retry = 0; retry < 5 && ret; retry++)
                ret = mcs7830_get_address(dev);
        if (ret) {
                dev_warn(&dev->udev->dev, "Cannot read MAC address\n");
                goto out;
        }
 
        /* Set up PHY */
        ret = mcs7830_set_autoneg(dev, 0);
        if (ret) {
                dev_info(&dev->udev->dev, "Cannot set autoneg\n");
                goto out;
        }
 
        mcs7830_rev_C_fixup(dev);
        ret = 0;
out:
        return ret;
}
 
static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,
                             int location)
{
        struct usbnet *dev = netdev->priv;
        return mcs7830_read_phy(dev, location);
}
 
static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,
                                int location, int val)
{
        struct usbnet *dev = netdev->priv;
        mcs7830_write_phy(dev, location, val);
}
 
static int mcs7830_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
{
        struct usbnet *dev = netdev_priv(net);
        return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
}
 
/* credits go to asix_set_multicast */
static void mcs7830_set_multicast(struct net_device *net)
{
        struct usbnet *dev = netdev_priv(net);
        struct mcs7830_data *data = (struct mcs7830_data *)&dev->data;
 
        data->config = HIF_REG_CONFIG_TXENABLE;
 
        /* this should not be needed, but it doesn't work otherwise */
        data->config |= HIF_REG_CONFIG_ALLMULTICAST;
 
        if (net->flags & IFF_PROMISC) {
                data->config |= HIF_REG_CONFIG_PROMISCIOUS;
        } else if (net->flags & IFF_ALLMULTI
                   || net->mc_count > MCS7830_MAX_MCAST) {
                data->config |= HIF_REG_CONFIG_ALLMULTICAST;
        } else if (net->mc_count == 0) {
                /* just broadcast and directed */
        } else {
                /* We use the 20 byte dev->data
                 * for our 8 byte filter buffer
                 * to avoid allocating memory that
                 * is tricky to free later */
                struct dev_mc_list *mc_list = net->mc_list;
                u32 crc_bits;
                int i;
 
                memset(data->multi_filter, 0, sizeof data->multi_filter);
 
                /* Build the multicast hash filter. */
                for (i = 0; i < net->mc_count; i++) {
                        crc_bits = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;
                        data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7);
                        mc_list = mc_list->next;
                }
 
                mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,
                                sizeof data->multi_filter,
                                data->multi_filter);
        }
 
        mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);
}
 
static int mcs7830_get_regs_len(struct net_device *net)
{
        struct usbnet *dev = netdev_priv(net);
 
        switch (mcs7830_get_rev(dev)) {
        case 1:
                return 21;
        case 2:
                return 32;
        }
        return 0;
}
 
static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo)
{
        usbnet_get_drvinfo(net, drvinfo);
        drvinfo->regdump_len = mcs7830_get_regs_len(net);
}
 
static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data)
{
        struct usbnet *dev = netdev_priv(net);
 
        regs->version = mcs7830_get_rev(dev);
        mcs7830_get_reg(dev, 0, regs->len, data);
}
 
static struct ethtool_ops mcs7830_ethtool_ops = {
        .get_drvinfo            = mcs7830_get_drvinfo,
        .get_regs_len           = mcs7830_get_regs_len,
        .get_regs               = mcs7830_get_regs,
 
        /* common usbnet calls */
        .get_link               = usbnet_get_link,
        .get_msglevel           = usbnet_get_msglevel,
        .set_msglevel           = usbnet_set_msglevel,
        .get_settings           = usbnet_get_settings,
        .set_settings           = usbnet_set_settings,
        .nway_reset             = usbnet_nway_reset,
};
 
static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev)
{
        struct net_device *net = dev->net;
        int ret;
 
        ret = mcs7830_init_dev(dev);
        if (ret)
                goto out;
 
        net->do_ioctl = mcs7830_ioctl;
        net->ethtool_ops = &mcs7830_ethtool_ops;
        net->set_multicast_list = mcs7830_set_multicast;
        mcs7830_set_multicast(net);
 
        /* reserve space for the status byte on rx */
        dev->rx_urb_size = ETH_FRAME_LEN + 1;
 
        dev->mii.mdio_read = mcs7830_mdio_read;
        dev->mii.mdio_write = mcs7830_mdio_write;
        dev->mii.dev = net;
        dev->mii.phy_id_mask = 0x3f;
        dev->mii.reg_num_mask = 0x1f;
        dev->mii.phy_id = *((u8 *) net->dev_addr + 1);
 
        ret = usbnet_get_endpoints(dev, udev);
out:
        return ret;
}
 
/* The chip always appends a status bytes that we need to strip */
static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
{
        u8 status;
 
        if (skb->len == 0) {
                dev_err(&dev->udev->dev, "unexpected empty rx frame\n");
                return 0;
        }
 
        skb_trim(skb, skb->len - 1);
        status = skb->data[skb->len];
 
        if (status != 0x20)
                dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);
 
        return skb->len > 0;
}
 
static const struct driver_info moschip_info = {
        .description    = "MOSCHIP 7830 usb-NET adapter",
        .bind           = mcs7830_bind,
        .rx_fixup       = mcs7830_rx_fixup,
        .flags          = FLAG_ETHER,
        .in             = 1,
        .out            = 2,
};
 
static const struct usb_device_id products[] = {
        {
                USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),
                .driver_info = (unsigned long) &moschip_info,
        },
        {},
};
MODULE_DEVICE_TABLE(usb, products);
 
static struct usb_driver mcs7830_driver = {
        .name = driver_name,
        .id_table = products,
        .probe = usbnet_probe,
        .disconnect = usbnet_disconnect,
        .suspend = usbnet_suspend,
        .resume = usbnet_resume,
};
 
static int __init mcs7830_init(void)
{
        return usb_register(&mcs7830_driver);
}
module_init(mcs7830_init);
 
static void __exit mcs7830_exit(void)
{
        usb_deregister(&mcs7830_driver);
}
module_exit(mcs7830_exit);
 
MODULE_DESCRIPTION("USB to network adapter MCS7830)");
MODULE_LICENSE("GPL");

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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [net/] [usb/] [mcs7830.c] - Blame information for rev 62

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* MosChips MCS7830 based USB 2.0 Ethernet Devices`
3			`*`
4			`* based on usbnet.c, asix.c and the vendor provided mcs7830 driver`
5			`*`
6			`* Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>`
7			`* Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>`
8			`* Copyright (C) 2005 Phil Chang <pchang23@sbcglobal.net>`
9			`* Copyright (c) 2002-2003 TiVo Inc.`
10			`*`
11			`* This program is free software; you can redistribute it and/or modify`
12			`* it under the terms of the GNU General Public License as published by`
13			`* the Free Software Foundation; either version 2 of the License, or`
14			`* (at your option) any later version.`
15			`*`
16			`* This program is distributed in the hope that it will be useful,`
17			`* but WITHOUT ANY WARRANTY; without even the implied warranty of`
18			`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
19			`* GNU General Public License for more details.`
20			`*`
21			`* You should have received a copy of the GNU General Public License`
22			`* along with this program; if not, write to the Free Software`
23			`* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA`
24			`*/`
25
26			`#include <linux/crc32.h>`
27			`#include <linux/etherdevice.h>`
28			`#include <linux/ethtool.h>`
29			`#include <linux/init.h>`
30			`#include <linux/mii.h>`
31			`#include <linux/module.h>`
32			`#include <linux/netdevice.h>`
33			`#include <linux/usb.h>`
34
35			`#include "usbnet.h"`
36
37			`/* requests */`
38			`#define MCS7830_RD_BMREQ (USB_DIR_IN \| USB_TYPE_VENDOR \| \`
39			`USB_RECIP_DEVICE)`
40			`#define MCS7830_WR_BMREQ (USB_DIR_OUT \| USB_TYPE_VENDOR \| \`
41			`USB_RECIP_DEVICE)`
42			`#define MCS7830_RD_BREQ 0x0E`
43			`#define MCS7830_WR_BREQ 0x0D`
44
45			`#define MCS7830_CTRL_TIMEOUT 1000`
46			`#define MCS7830_MAX_MCAST 64`
47
48			`#define MCS7830_VENDOR_ID 0x9710`
49			`#define MCS7830_PRODUCT_ID 0x7830`
50
51			`#define MCS7830_MII_ADVERTISE (ADVERTISE_PAUSE_CAP \| ADVERTISE_100FULL \| \`
52			`ADVERTISE_100HALF \| ADVERTISE_10FULL \| \`
53			`ADVERTISE_10HALF \| ADVERTISE_CSMA)`
54
55			`/* HIF_REG_XX coressponding index value */`
56			`enum {`
57			`HIF_REG_MULTICAST_HASH = 0x00,`
58			`HIF_REG_PACKET_GAP1 = 0x08,`
59			`HIF_REG_PACKET_GAP2 = 0x09,`
60			`HIF_REG_PHY_DATA = 0x0a,`
61			`HIF_REG_PHY_CMD1 = 0x0c,`
62			`HIF_REG_PHY_CMD1_READ = 0x40,`
63			`HIF_REG_PHY_CMD1_WRITE = 0x20,`
64			`HIF_REG_PHY_CMD1_PHYADDR = 0x01,`
65			`HIF_REG_PHY_CMD2 = 0x0d,`
66			`HIF_REG_PHY_CMD2_PEND_FLAG_BIT = 0x80,`
67			`HIF_REG_PHY_CMD2_READY_FLAG_BIT = 0x40,`
68			`HIF_REG_CONFIG = 0x0e,`
69			`HIF_REG_CONFIG_CFG = 0x80,`
70			`HIF_REG_CONFIG_SPEED100 = 0x40,`
71			`HIF_REG_CONFIG_FULLDUPLEX_ENABLE = 0x20,`
72			`HIF_REG_CONFIG_RXENABLE = 0x10,`
73			`HIF_REG_CONFIG_TXENABLE = 0x08,`
74			`HIF_REG_CONFIG_SLEEPMODE = 0x04,`
75			`HIF_REG_CONFIG_ALLMULTICAST = 0x02,`
76			`HIF_REG_CONFIG_PROMISCIOUS = 0x01,`
77			`HIF_REG_ETHERNET_ADDR = 0x0f,`
78			`HIF_REG_22 = 0x15,`
79			`HIF_REG_PAUSE_THRESHOLD = 0x16,`
80			`HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0,`
81			`};`
82
83			`struct mcs7830_data {`
84			`u8 multi_filter[8];`
85			`u8 config;`
86			`};`
87
88			`static const char driver_name[] = "MOSCHIP usb-ethernet driver";`
89
90			`static int mcs7830_get_reg(struct usbnet dev, u16 index, u16 size, void data)`
91			`{`
92			`struct usb_device *xdev = dev->udev;`
93			`int ret;`
94
95			`ret = usb_control_msg(xdev, usb_rcvctrlpipe(xdev, 0), MCS7830_RD_BREQ,`
96			`MCS7830_RD_BMREQ, 0x0000, index, data,`
97			`size, MCS7830_CTRL_TIMEOUT);`
98			`return ret;`
99			`}`
100
101			`static int mcs7830_set_reg(struct usbnet dev, u16 index, u16 size, void data)`
102			`{`
103			`struct usb_device *xdev = dev->udev;`
104			`int ret;`
105
106			`ret = usb_control_msg(xdev, usb_sndctrlpipe(xdev, 0), MCS7830_WR_BREQ,`
107			`MCS7830_WR_BMREQ, 0x0000, index, data,`
108			`size, MCS7830_CTRL_TIMEOUT);`
109			`return ret;`
110			`}`
111
112			`static void mcs7830_async_cmd_callback(struct urb *urb)`
113			`{`
114			`struct usb_ctrlrequest req = (struct usb_ctrlrequest )urb->context;`
115
116			`if (urb->status < 0)`
117			`printk(KERN_DEBUG "%s() failed with %d\n",`
118			`__FUNCTION__, urb->status);`
119
120			`kfree(req);`
121			`usb_free_urb(urb);`
122			`}`
123
124			`static void mcs7830_set_reg_async(struct usbnet dev, u16 index, u16 size, void data)`
125			`{`
126			`struct usb_ctrlrequest *req;`
127			`int ret;`
128			`struct urb *urb;`
129
130			`urb = usb_alloc_urb(0, GFP_ATOMIC);`
131			`if (!urb) {`
132			`dev_dbg(&dev->udev->dev,`
133			`"Error allocating URB in write_cmd_async!\n");`
134			`return;`
135			`}`
136
137			`req = kmalloc(sizeof *req, GFP_ATOMIC);`
138			`if (!req) {`
139			`dev_err(&dev->udev->dev,`
140			`"Failed to allocate memory for control request\n");`
141			`goto out;`
142			`}`
143			`req->bRequestType = MCS7830_WR_BMREQ;`
144			`req->bRequest = MCS7830_WR_BREQ;`
145			`req->wValue = 0;`
146			`req->wIndex = cpu_to_le16(index);`
147			`req->wLength = cpu_to_le16(size);`
148
149			`usb_fill_control_urb(urb, dev->udev,`
150			`usb_sndctrlpipe(dev->udev, 0),`
151			`(void *)req, data, size,`
152			`mcs7830_async_cmd_callback, req);`
153
154			`ret = usb_submit_urb(urb, GFP_ATOMIC);`
155			`if (ret < 0) {`
156			`dev_err(&dev->udev->dev,`
157			`"Error submitting the control message: ret=%d\n", ret);`
158			`goto out;`
159			`}`
160			`return;`
161			`out:`
162			`kfree(req);`
163			`usb_free_urb(urb);`
164			`}`
165
166			`static int mcs7830_get_address(struct usbnet *dev)`
167			`{`
168			`int ret;`
169			`ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN,`
170			`dev->net->dev_addr);`
171			`if (ret < 0)`
172			`return ret;`
173			`return 0;`
174			`}`
175
176			`static int mcs7830_read_phy(struct usbnet *dev, u8 index)`
177			`{`
178			`int ret;`
179			`int i;`
180			`__le16 val;`
181
182			`u8 cmd[2] = {`
183			`HIF_REG_PHY_CMD1_READ \| HIF_REG_PHY_CMD1_PHYADDR,`
184			`HIF_REG_PHY_CMD2_PEND_FLAG_BIT \| index,`
185			`};`
186
187			`mutex_lock(&dev->phy_mutex);`
188			`/* write the MII command */`
189			`ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);`
190			`if (ret < 0)`
191			`goto out;`
192
193			`/* wait for the data to become valid, should be within < 1ms */`
194			`for (i = 0; i < 10; i++) {`
195			`ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);`
196			`if ((ret < 0) \|\| (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))`
197			`break;`
198			`ret = -EIO;`
199			`msleep(1);`
200			`}`
201			`if (ret < 0)`
202			`goto out;`
203
204			`/* read actual register contents */`
205			`ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val);`
206			`if (ret < 0)`
207			`goto out;`
208			`ret = le16_to_cpu(val);`
209			`dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n",`
210			`index, val, i);`
211			`out:`
212			`mutex_unlock(&dev->phy_mutex);`
213			`return ret;`
214			`}`
215
216			`static int mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val)`
217			`{`
218			`int ret;`
219			`int i;`
220			`__le16 le_val;`
221
222			`u8 cmd[2] = {`
223			`HIF_REG_PHY_CMD1_WRITE \| HIF_REG_PHY_CMD1_PHYADDR,`
224			`HIF_REG_PHY_CMD2_PEND_FLAG_BIT \| (index & 0x1F),`
225			`};`
226
227			`mutex_lock(&dev->phy_mutex);`
228
229			`/* write the new register contents */`
230			`le_val = cpu_to_le16(val);`
231			`ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val);`
232			`if (ret < 0)`
233			`goto out;`
234
235			`/* write the MII command */`
236			`ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);`
237			`if (ret < 0)`
238			`goto out;`
239
240			`/* wait for the command to be accepted by the PHY */`
241			`for (i = 0; i < 10; i++) {`
242			`ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd);`
243			`if ((ret < 0) \|\| (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT))`
244			`break;`
245			`ret = -EIO;`
246			`msleep(1);`
247			`}`
248			`if (ret < 0)`
249			`goto out;`
250
251			`ret = 0;`
252			`dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n",`
253			`index, val, i);`
254			`out:`
255			`mutex_unlock(&dev->phy_mutex);`
256			`return ret;`
257			`}`
258
259			`/*`
260			`* This algorithm comes from the original mcs7830 version 1.4 driver,`
261			`* not sure if it is needed.`
262			`*/`
263			`static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode)`
264			`{`
265			`int ret;`
266			`/* Enable all media types */`
267			`ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE);`
268
269			`/* First reset BMCR */`
270			`if (!ret)`
271			`ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000);`
272			`/* Enable Auto Neg */`
273			`if (!ret)`
274			`ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE);`
275			`/* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */`
276			`if (!ret)`
277			`ret = mcs7830_write_phy(dev, MII_BMCR,`
278			`BMCR_ANENABLE \| BMCR_ANRESTART );`
279			`return ret < 0 ? : 0;`
280			`}`
281
282
283			`/*`
284			`* if we can read register 22, the chip revision is C or higher`
285			`*/`
286			`static int mcs7830_get_rev(struct usbnet *dev)`
287			`{`
288			`u8 dummy[2];`
289			`int ret;`
290			`ret = mcs7830_get_reg(dev, HIF_REG_22, 2, dummy);`
291			`if (ret > 0)`
292			`return 2; /* Rev C or later */`
293			`return 1; /* earlier revision */`
294			`}`
295
296			`/*`
297			`* On rev. C we need to set the pause threshold`
298			`*/`
299			`static void mcs7830_rev_C_fixup(struct usbnet *dev)`
300			`{`
301			`u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT;`
302			`int retry;`
303
304			`for (retry = 0; retry < 2; retry++) {`
305			`if (mcs7830_get_rev(dev) == 2) {`
306			`dev_info(&dev->udev->dev, "applying rev.C fixup\n");`
307			`mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD,`
308			`1, &pause_threshold);`
309			`}`
310			`msleep(1);`
311			`}`
312			`}`
313
314			`static int mcs7830_init_dev(struct usbnet *dev)`
315			`{`
316			`int ret;`
317			`int retry;`
318
319			`/* Read MAC address from EEPROM */`
320			`ret = -EINVAL;`
321			`for (retry = 0; retry < 5 && ret; retry++)`
322			`ret = mcs7830_get_address(dev);`
323			`if (ret) {`
324			`dev_warn(&dev->udev->dev, "Cannot read MAC address\n");`
325			`goto out;`
326			`}`
327
328			`/* Set up PHY */`
329			`ret = mcs7830_set_autoneg(dev, 0);`
330			`if (ret) {`
331			`dev_info(&dev->udev->dev, "Cannot set autoneg\n");`
332			`goto out;`
333			`}`
334
335			`mcs7830_rev_C_fixup(dev);`
336			`ret = 0;`
337			`out:`
338			`return ret;`
339			`}`
340
341			`static int mcs7830_mdio_read(struct net_device *netdev, int phy_id,`
342			`int location)`
343			`{`
344			`struct usbnet *dev = netdev->priv;`
345			`return mcs7830_read_phy(dev, location);`
346			`}`
347
348			`static void mcs7830_mdio_write(struct net_device *netdev, int phy_id,`
349			`int location, int val)`
350			`{`
351			`struct usbnet *dev = netdev->priv;`
352			`mcs7830_write_phy(dev, location, val);`
353			`}`
354
355			`static int mcs7830_ioctl(struct net_device net, struct ifreq rq, int cmd)`
356			`{`
357			`struct usbnet *dev = netdev_priv(net);`
358			`return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);`
359			`}`
360
361			`/* credits go to asix_set_multicast */`
362			`static void mcs7830_set_multicast(struct net_device *net)`
363			`{`
364			`struct usbnet *dev = netdev_priv(net);`
365			`struct mcs7830_data data = (struct mcs7830_data )&dev->data;`
366
367			`data->config = HIF_REG_CONFIG_TXENABLE;`
368
369			`/* this should not be needed, but it doesn't work otherwise */`
370			`data->config \|= HIF_REG_CONFIG_ALLMULTICAST;`
371
372			`if (net->flags & IFF_PROMISC) {`
373			`data->config \|= HIF_REG_CONFIG_PROMISCIOUS;`
374			`} else if (net->flags & IFF_ALLMULTI`
375			`\|\| net->mc_count > MCS7830_MAX_MCAST) {`
376			`data->config \|= HIF_REG_CONFIG_ALLMULTICAST;`
377			`} else if (net->mc_count == 0) {`
378			`/* just broadcast and directed */`
379			`} else {`
380			`/* We use the 20 byte dev->data`
381			`* for our 8 byte filter buffer`
382			`* to avoid allocating memory that`
383			`* is tricky to free later */`
384			`struct dev_mc_list *mc_list = net->mc_list;`
385			`u32 crc_bits;`
386			`int i;`
387
388			`memset(data->multi_filter, 0, sizeof data->multi_filter);`
389
390			`/* Build the multicast hash filter. */`
391			`for (i = 0; i < net->mc_count; i++) {`
392			`crc_bits = ether_crc(ETH_ALEN, mc_list->dmi_addr) >> 26;`
393			`data->multi_filter[crc_bits >> 3] \|= 1 << (crc_bits & 7);`
394			`mc_list = mc_list->next;`
395			`}`
396
397			`mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH,`
398			`sizeof data->multi_filter,`
399			`data->multi_filter);`
400			`}`
401
402			`mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config);`
403			`}`
404
405			`static int mcs7830_get_regs_len(struct net_device *net)`
406			`{`
407			`struct usbnet *dev = netdev_priv(net);`
408
409			`switch (mcs7830_get_rev(dev)) {`
410			`case 1:`
411			`return 21;`
412			`case 2:`
413			`return 32;`
414			`}`
415			`return 0;`
416			`}`
417
418			`static void mcs7830_get_drvinfo(struct net_device net, struct ethtool_drvinfo drvinfo)`
419			`{`
420			`usbnet_get_drvinfo(net, drvinfo);`
421			`drvinfo->regdump_len = mcs7830_get_regs_len(net);`
422			`}`
423
424			`static void mcs7830_get_regs(struct net_device net, struct ethtool_regs regs, void *data)`
425			`{`
426			`struct usbnet *dev = netdev_priv(net);`
427
428			`regs->version = mcs7830_get_rev(dev);`
429			`mcs7830_get_reg(dev, 0, regs->len, data);`
430			`}`
431
432			`static struct ethtool_ops mcs7830_ethtool_ops = {`
433			`.get_drvinfo = mcs7830_get_drvinfo,`
434			`.get_regs_len = mcs7830_get_regs_len,`
435			`.get_regs = mcs7830_get_regs,`
436
437			`/* common usbnet calls */`
438			`.get_link = usbnet_get_link,`
439			`.get_msglevel = usbnet_get_msglevel,`
440			`.set_msglevel = usbnet_set_msglevel,`
441			`.get_settings = usbnet_get_settings,`
442			`.set_settings = usbnet_set_settings,`
443			`.nway_reset = usbnet_nway_reset,`
444			`};`
445
446			`static int mcs7830_bind(struct usbnet dev, struct usb_interface udev)`
447			`{`
448			`struct net_device *net = dev->net;`
449			`int ret;`
450
451			`ret = mcs7830_init_dev(dev);`
452			`if (ret)`
453			`goto out;`
454
455			`net->do_ioctl = mcs7830_ioctl;`
456			`net->ethtool_ops = &mcs7830_ethtool_ops;`
457			`net->set_multicast_list = mcs7830_set_multicast;`
458			`mcs7830_set_multicast(net);`
459
460			`/* reserve space for the status byte on rx */`
461			`dev->rx_urb_size = ETH_FRAME_LEN + 1;`
462
463			`dev->mii.mdio_read = mcs7830_mdio_read;`
464			`dev->mii.mdio_write = mcs7830_mdio_write;`
465			`dev->mii.dev = net;`
466			`dev->mii.phy_id_mask = 0x3f;`
467			`dev->mii.reg_num_mask = 0x1f;`
468			`dev->mii.phy_id = ((u8 ) net->dev_addr + 1);`
469
470			`ret = usbnet_get_endpoints(dev, udev);`
471			`out:`
472			`return ret;`
473			`}`
474
475			`/* The chip always appends a status bytes that we need to strip */`
476			`static int mcs7830_rx_fixup(struct usbnet dev, struct sk_buff skb)`
477			`{`
478			`u8 status;`
479
480			`if (skb->len == 0) {`
481			`dev_err(&dev->udev->dev, "unexpected empty rx frame\n");`
482			`return 0;`
483			`}`
484
485			`skb_trim(skb, skb->len - 1);`
486			`status = skb->data[skb->len];`
487
488			`if (status != 0x20)`
489			`dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status);`
490
491			`return skb->len > 0;`
492			`}`
493
494			`static const struct driver_info moschip_info = {`
495			`.description = "MOSCHIP 7830 usb-NET adapter",`
496			`.bind = mcs7830_bind,`
497			`.rx_fixup = mcs7830_rx_fixup,`
498			`.flags = FLAG_ETHER,`
499			`.in = 1,`
500			`.out = 2,`
501			`};`
502
503			`static const struct usb_device_id products[] = {`
504			`{`
505			`USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID),`
506			`.driver_info = (unsigned long) &moschip_info,`
507			`},`
508			`{},`
509			`};`
510			`MODULE_DEVICE_TABLE(usb, products);`
511
512			`static struct usb_driver mcs7830_driver = {`
513			`.name = driver_name,`
514			`.id_table = products,`
515			`.probe = usbnet_probe,`
516			`.disconnect = usbnet_disconnect,`
517			`.suspend = usbnet_suspend,`
518			`.resume = usbnet_resume,`
519			`};`
520
521			`static int __init mcs7830_init(void)`
522			`{`
523			`return usb_register(&mcs7830_driver);`
524			`}`
525			`module_init(mcs7830_init);`
526
527			`static void __exit mcs7830_exit(void)`
528			`{`
529			`usb_deregister(&mcs7830_driver);`
530			`}`
531			`module_exit(mcs7830_exit);`
532
533			`MODULE_DESCRIPTION("USB to network adapter MCS7830)");`
534			`MODULE_LICENSE("GPL");`